All right, you can have any given length, but that length can be divided into increments of 1/2, 1/4, 1/8, 1/16, all numbers associated with the inch program not tenths. The Wheel has six points, double that and you have the twelve units of the foot. This could be rolled out with a large wheel, I have seen large wheel used for marking devices. That is all the divider are doing when walking off X-number of steps.

Was there a base length? At times I have wondered if the length of the available wood was the key, then was split into it 1/8's or 1/16's and the rest of the frame was built according to that original longest needed stick.

That is a start, go ahead and pick it apart and say there is no connection.

By the way, it is not raining just a late lunch and I am home alone.

Tim